CN115259282A - Water purifier and control method thereof - Google Patents

Abstract

The invention provides a water purifier and a control method thereof, wherein the water purifier comprises an electric pressure device and a main water pipeline communicated to a water intake, a filtering device, a water storage device and a water intake control device are arranged on the main water pipeline, the water storage device comprises a first cavity and a second cavity, the volumes of the first cavity and the second cavity are in negative correlation, the first cavity is communicated with the main water pipeline and is used for storing filtered water filtered by the filtering device, the second cavity is communicated with the electric pressure device, and the electric pressure device is configured to pressurize the second cavity when the water intake control device generates a water intake starting electric signal in response to a water intake operation of a user, so that the pressure in the second cavity is greater than the pressure in the first cavity. Compare in the purifier that has the pressure bucket, this purifier can pressurize to the second intracavity through electronic pressure assembly to make the pressure in the second intracavity keep at higher pressure range, thereby can guarantee that the water yield of purifier is stable, avoid along with the circumstances that the water yield reduces appearing in the discharge of drainage, improve user's water intaking speed.

Description

A water purifier and its control method

technical field

The invention relates to the technical field of water purification, in particular to a water purifier and a control method for the water purifier.

Background technique

With the public's pursuit of quality of life, water purifiers have gradually entered people's homes.

Depending on the working principle of the filter element, some water purifiers have a smaller water output per unit time, such as reverse osmosis water purifiers. In order to achieve fast water intake, most of the prior art is to install a pressure barrel in the water purifier, and store the filtered water prepared by the filter element in advance in the pressure barrel. discharge, in order to achieve the effect of increasing the water output per unit time of the water purifier.

During the water intake process, the amount of filtered water in the pressure tank gradually decreases, and the squeezing force of the air bag on the filtered water also decreases accordingly. In this way, there will be a phenomenon that the water output is large when the water is started to be taken, and the water output will decrease as the filtered water in the pressure tank is discharged, resulting in unstable water output pressure of the water purifier and affecting the user experience.

Contents of the invention

In order to at least partly solve the problems existing in the prior art, according to one aspect of the present invention, a water purifier is provided, the water purifier includes an electric pressure device and a main water pipeline connected to the water intake, along the water flow direction on the main water pipeline A filter device, a water storage device and a water intake control device are provided in sequence. The water storage device includes a first chamber and a second chamber. The first chamber communicates with the main water pipeline. The first chamber is used to store filtered water filtered by the filter device. The second chamber communicates with the electric pressure device. The first chamber and the second chamber can change their volumes according to the pressure in the chamber, and the volumes of the first chamber and the second chamber are negatively correlated. The electric pressure device is configured to respond to the user's action when the water intake control device When the water-feeding operation generates a water-feeding start signal, pressurize the second chamber so that the pressure in the second chamber is greater than the pressure in the first chamber.

Compared with the water purifiers with pressure barrels in the prior art, the water purifier provided by the present invention can pressurize the second chamber through the electric pressure assembly, so that the pressure in the second chamber can be maintained at a higher pressure range, so as to ensure the stability of the water output of the water purifier and avoid the decrease of the water output with the discharge of filtered water, thereby increasing the water intake speed of the user and improving the user experience.

Exemplarily, the electric pressure device is further configured to make the pressure in the second chamber continuously greater than the pressure in the first chamber according to the electric signal for starting water intake, at least until the user stops water intake.

The function of the water purifier with this setting is that the filtered water can be discharged from the water intake first, so as to prevent the filtered water from entering the first chamber before the water intake, thereby affecting the water intake speed of the user.

Exemplarily, the electric pressure device is further configured to make the pressure in the second chamber lower than the pressure in the first chamber immediately when the user stops taking water, so as to store filtered water in the first chamber.

The function of the water purifier with this setting is to store filtered water in the first chamber immediately after the user stops taking water, which can improve the use efficiency of the water purifier and shorten the working time of the water purifier.

Exemplarily, the filter device includes a reverse osmosis filter element, the electric pressure device includes a booster pump and a pressure pipeline, the outlet of the booster pump communicates with the raw water port of the reverse osmosis filter element, and the pure water port of the reverse osmosis filter element communicates with the second water inlet through the main water pipeline. The first cavity is connected, the concentrated water port of the reverse osmosis filter element is connected with the second cavity through the pressure pipeline, and the booster pump operates according to the signal of starting water and electricity.

For the reverse osmosis water purifier, the booster pump is necessary, so the improved water purifier does not significantly increase the number of devices in the water purifier, and the shape, structure and waterway layout of the existing water purifier are not affected. There are little changes, so lower manufacturing costs can be guaranteed.

Exemplarily, the electric pressure device further includes: a waste water ratio valve, the waste water ratio valve is arranged on the pressure pipeline; The valve and the water storage device are connected to the pressure pipeline, and a concentrated water control valve is also arranged on the concentrated water pipeline.

By setting the wastewater ratio valve on the concentrated water pipeline, the concentrated water can be conveniently used to increase the water intake of users.

Exemplarily, the electric pressure device further includes a drain signal generator, which is used to generate a drain electric signal when the volume of the second chamber stops increasing. The drain signal generator is electrically connected to the concentrated water control valve, and the concentrated water control valve is configured according to Drain electrical signal to open.

The water purifier with this setting can control the on/off of the concentrated water control valve through the drainage signal generator, and then release the pressure of the second chamber of the water storage device. In this way, it can ensure that the pure water will continue to be stored in the first chamber after the water intake is completed, and it can also ensure that after the second chamber squeezes the first chamber, the concentrated water can be discharged from the drain port to protect the reverse osmosis filter element. .

Exemplarily, the electric pressure device further includes a flushing control valve, the flushing control valve is connected in parallel with the waste water ratio valve on the pressure pipeline, the flushing control valve is electrically connected with the water intake control device, and the flushing control valve generates a signal to start water intake by the water intake control device Open.

This setting not only increases the water output per unit time compared with the water purifier in the prior art, but also can further increase the water output per unit time compared with the embodiment in which concentrated water is used to squeeze the first chamber.

Exemplarily, the electric pressure device further includes a drain signal generator, which is used to generate a drain electric signal when the volume of the second chamber stops increasing. The drain signal generator is electrically connected to the concentrated water control valve and the flushing control valve. The water control valve is opened according to the drain electric signal, and the flushing control valve is closed according to the drain electric signal.

The water purifier with this setting can release the pressure of the second chamber of the water storage device and control the use state of the reverse osmosis filter element through the drainage signal generator, the concentrated water control valve and the flushing control valve. This can not only ensure that the reverse osmosis filter element is converted from the flushing state to the normal water production state after the flushing water is used to squeeze the first chamber, but also the concentrated water can be discharged from the drain port to protect the reverse osmosis filter element.

Exemplarily, the drainage signal generator includes a first high-pressure switch, the first high-pressure switch is arranged on the pressure pipeline and is located between the wastewater ratio valve and the water storage device, and the pressure in the pipeline where the first high-pressure switch is located reaches the first Generates a drain electrical signal at pressure levels.

When the drainage signal generator includes the first high-pressure switch, no matter whether the user stops water intake before or after the pure water in the first chamber is exhausted, the first high-pressure switch can only be used to generate a drainage electrical signal to control the concentrated water control valve Open, so the control logic is simple and does not need to be used in conjunction with other sensors. In addition, in this embodiment, not only the pressure in the pipeline can be directly used to control the concentrated water control valve, but also the detected pressure can be used as the safety pressure of the pipeline to reduce the risk of using factors such as flow rate and time for control. error. Moreover, the cost of the high-voltage switch is low, the precision is high, and it is strong and durable.

Exemplarily, the electrodynamic pressure device includes an air pump connected to the second chamber.

In the case of using an air pump, the water purifier can use various types of filter elements, and the reason is that a booster pump can be used as an electric pressure device at this time.

Exemplarily, the second chamber is provided with an exhaust port, and the exhaust port is connected with an exhaust device, and the exhaust device is opened when the volume of the second chamber stops increasing or when the user stops taking water.

There are many types of control methods for the water purifier with this setting, which can be applied to different devices and application occasions.

Exemplarily, the exhaust device includes a second high pressure switch and a control valve, the second high pressure switch generates an electrical exhaust signal when the pressure in the second chamber reaches a second pressure level, and the control valve opens according to the electrical exhaust signal.

The water purifier with this setting can control the exhaust device according to the pressure in the second chamber, and its logic is simple and easy to realize.

Illustratively, the air pump has a safety valve, and the vent opens when the user stops dispensing water.

The air pump with a safety valve can make the shutdown of the air pump only controlled by the signal of stopping water and electricity, so the logic is simple, and the number of devices on the water purifier can also be reduced.

Exemplarily, the exhaust device includes an automatic exhaust valve, which is opened when the volume of the second chamber stops increasing.

By setting the exhaust device as an automatic exhaust valve, the control logic relationship between the various devices in the water purifier can be reduced, and the automatic exhaust valve has a simple structure, convenient installation, low cost and easy implementation.

Exemplarily, the water intake control device includes a one-way valve and a third high pressure switch arranged in sequence along the water flow direction, and the maximum pressure in the second chamber is lower than the closing pressure of the third high pressure switch.

The water purifier with this setting can be connected to a mechanical faucet at the water intake. By operating the mechanical faucet, the pressure in the main water pipeline can be changed, and then the water purifier can be controlled, which improves the scope of application of the water purifier to the faucet.

According to another aspect of the present invention, there is provided a control method for a water purifier. The water purifier includes an electric pressure device and a main water pipeline connected to the water intake. On the main water pipeline, a filter device and The water storage device, the water storage device includes a first chamber and a second chamber, the first chamber communicates with the main water pipeline, the first chamber is used to store filtered water filtered by the filter device, the second chamber communicates with the electric pressure device, and the first chamber communicates with the main water pipeline. The chamber and the second chamber can change their volumes according to the pressure in the chamber, and the volumes of the first chamber and the second chamber are negatively correlated. The control method includes: generating an electrical signal to start water intake in response to the user's water intake operation; The electrical signal pressurizes the second chamber such that the pressure in the second chamber is greater than the pressure in the first chamber.

This method pressurizes the second cavity through the electric pressure component, so that the pressure in the second cavity is maintained at a relatively high pressure range, thereby ensuring the stability of the water output of the water purifier and avoiding the occurrence of When the water output is reduced, the user's water intake speed can be increased, and the user's experience can be improved.

Exemplarily, in the step of pressurizing the second chamber, the electric pressure device makes the pressure in the second chamber continuously greater than the pressure in the first chamber according to the signal of starting to take water; the control method is to pressurize the second chamber After the step of pressing, it also includes: the electric pressure device makes the pressure in the second chamber lower than the pressure in the first chamber when the user stops taking water.

In this way, the filtered water can be stored in the first cavity immediately after the user stops taking water, which can improve the use efficiency of the water purifier and shorten the working time of the water purifier.

Exemplarily, the filter device includes a reverse osmosis filter element, and the electric pressure device includes a booster pump, a pressure pipeline, a waste water ratio valve, and a concentrated water pipeline. The water port is connected to the first chamber through the main water pipeline, the concentrated water port of the reverse osmosis filter element is connected to the second chamber through the pressure pipeline, the waste water ratio valve is set on the pressure pipeline, and one end of the concentrated water pipeline is connected to the drain of the water purifier. The other end of the concentrated water pipeline is connected to the pressure pipeline between the wastewater ratio valve and the water storage device. A concentrated water control valve is also installed on the concentrated water pipeline. After the step of pressurizing the second chamber, the control method further includes: generating a drainage electrical signal when the volume of the second chamber stops increasing; opening the concentrated water control valve according to the drainage electrical signal; And when the first chamber reaches its maximum volume, stop the booster pump and close the concentrated water control valve.

The method is mainly aimed at the reverse osmosis water purifier, which utilizes the existing components of the reverse osmosis water purifier to achieve the purpose of the present invention, so the cost is not significantly increased, and the control logic is simple and easy to implement.

Exemplarily, the electric pressure device further includes a flushing control valve, and the flushing control valve is connected to the pressure pipeline in parallel with the waste water ratio valve. The valve opens the concentrated water control valve according to the drainage electric signal, and also closes the flushing control valve.

In this way, flushing water can be used to squeeze the first chamber, so not only the water output per unit time is improved compared with the water purifier in the prior art, but also compared with the embodiment of using concentrated water to squeeze the first chamber. Increase the water output per unit time.

Exemplarily, the electric pressure device further includes a flushing control valve, and the flushing control valve and the waste water ratio valve are connected in parallel on the pressure pipeline, and the control method further includes: accumulating the working hours of the reverse osmosis filter element; when the first chamber reaches its maximum volume, Judging whether the working time is greater than the first preset threshold, wherein, when the working time is longer than the first preset threshold, the booster pump continues to run, and the flushing control valve and the concentrated water control valve are opened to flush the reverse osmosis filter element; The time for flushing the reverse osmosis filter element is timed to obtain the flushing duration; judge whether the flushing duration is greater than the second preset threshold, wherein, when the flushing duration is greater than the second preset threshold, stop the booster pump and close the flushing control valve and concentrated water control valve; and reaccumulate the working hours of the reverse osmosis filter element.

The method can perform flushing according to the working hours of the reverse osmosis filter element, which not only reduces the flushing frequency of the water purifier but also saves water resources.

Exemplarily, in the process of flushing the reverse osmosis filter element, when receiving the electric signal to start taking water, close the flushing control valve and the concentrated water control valve, and return to the step of pressurizing the second chamber.

This method can prevent the impact of the flushing process on the user's water intake.

A series of concepts in simplified form are introduced in the Summary of the Invention, which will be further detailed in the Detailed Description. The summary of the present invention does not mean trying to limit the key features and essential technical features of the claimed technical solution, nor does it mean trying to determine the protection scope of the claimed technical solution.

The advantages and features of the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

The following drawings of the invention are hereby included as part of the invention for understanding the invention. Embodiments of the present invention and description thereof are shown in the drawings to explain the principles of the present invention. In the attached picture,

Fig. 1-3 is respectively according to the waterway schematic diagram of the water purifier of different exemplary embodiments of the present invention; And

4-9 are flowcharts of control methods for a water purifier according to different exemplary embodiments of the present invention.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

101. Water intake; 102. Drainage port; 210. Booster pump; 220. Pressure pipeline; 221. First high pressure switch; 222. Waste water ratio valve; 223. Flushing control valve; 230. Air pump; 300. Main water pipeline ; 310, reverse osmosis filter element; 311, raw water outlet; 312, pure water outlet; 313, concentrated water outlet; 320, water storage device; 321, first cavity; 322, second cavity; Directional valve; 332, the third high pressure switch; 400, concentrated water pipeline; 410, concentrated water control valve.

Detailed ways

In the following description, numerous details are provided in order to provide a thorough understanding of the invention. It will be appreciated, however, to those skilled in the art that the following description is merely illustrative of preferred embodiments of the invention, and that the invention may be practiced without one or more of these details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

According to one aspect of the present invention, a water purifier is provided. As shown in FIG. 1 , the water purifier may include an electric pressure device and a main water pipeline 300 . The main water pipeline 300 is connected to the water intake 101 . The inlet of the main water pipeline 300 can be connected to the tap water pipeline, and the outlet can be connected to the water intake 101 . The user can obtain the water purified by the water purifier from the water intake 101 . A filtering device, a water storage device 320 and a water intake control device are sequentially arranged on the main water pipeline 300 along the water flow direction. The filter device may be one or more of ultrafiltration filter elements, nanofiltration filter elements, reverse osmosis filter elements, activated carbon filter elements, PP cotton filter elements, and the like. The water intake control device can be an electric control faucet, a water outlet control switch, or a component used in conjunction with a mechanical faucet. The water storage device 320 may include a first cavity 321 and a second cavity 322 . The first chamber 321 communicates with the main water pipeline 300, and the second chamber 322 may communicate with the electric pressure device. The first cavity 321 is used to store filtered water filtered by the filter device. The volumes of the first cavity 321 and the second cavity 322 can be changed according to the pressure in the cavity. The volumes of the first cavity 321 and the second cavity 322 are negatively correlated. When the volume of the second chamber 322 increases, the volume of the first chamber 321 decreases; conversely, when the volume of the second chamber 322 decreases, the volume of the first chamber 321 increases. The sum of the volumes of the first cavity 321 and the second cavity 322 may be a certain value. Therefore, by controlling the volume of the second chamber 322 , water can be stored in the first chamber 321 or drained from the first chamber 321 . The electric pressure device is configured to pressurize the second cavity 322 when the water intake control device generates an electric signal to start water intake, so that the pressure in the second cavity 322 is greater than the pressure in the first cavity 321 . The water taking control device may generate a water and electricity start signal in response to a user's water taking operation.

Specifically, during use, the filtered filtered water can be first stored in the first chamber 321, and when the water intake control device generates a signal to start water intake, the electric pressure device pressurizes the second chamber 322, so that the water in the second chamber 322 The pressure is maintained in a relatively high pressure range, so that the first cavity 321 can be squeezed powerfully and stably. In this way, the filtered water in the first chamber 321 can be discharged more stably for the user to take. The electric pressure device may be any device including a pump structure, and may also be a device including a piston that can provide constant extrusion force.

In the device in which the electric pressure device has a pump structure, the pump can inject gas or liquid into the second chamber 322 to increase the pressure in the second chamber 322 . Then, through the extrusion of the second chamber 322 to the first chamber 321, the pre-stored filtered water in the first chamber 321 is discharged in a relatively stable and large amount.

Compared with the water purifiers with pressure barrels in the prior art, the water purifier provided by the present invention can pressurize the second chamber 322 through the electric pressure assembly, so that the pressure in the second chamber 322 can be maintained at a higher level The pressure range can ensure the stability of the water output of the water purifier, and avoid the decrease of the water output with the discharge of filtered water, so as to increase the water intake speed of the user and improve the user experience.

Exemplarily, the electric pressure device is further configured to make the pressure in the second chamber 322 continuously greater than the pressure in the first chamber 321 at least before the user stops water intake according to the electrical signal for starting water intake. In one embodiment, after the user starts to take water and before the user stops taking water, the electric pressure device can always be activated to provide pressure for the second chamber 322 . On this premise, in order to prevent the pressure in the second chamber 322 from continuously increasing and causing damage, the pressure in the second chamber 322 may be released when the pressure in the second chamber 322 reaches a certain level. In this way, the liquid or gas in the second chamber 322 can maintain a dynamic equilibrium state. In this state, although the pressure in the second chamber 322 is lower than before the pressure release, the first chamber connected to the water intake Compared with 321, its pressure value can be slightly higher. The realization method may be to control the pressure release amount of the second chamber 322 so that it is smaller than the pressurization amount of the electric pressure device. In another embodiment, still in order to prevent the pressure in the second chamber 322 from continuing to rise and cause damage, it is also possible to stop the electric pressure device from providing pressure to the second chamber 322 after the second chamber 322 has reached the maximum volume, And keep the airtight state of the second chamber 322 until the user stops taking water.

The function of the water purifier with this setting is that the filtered water can be discharged from the water intake 101 first, so as to prevent the filtered water from entering the first cavity 321 before the water intake 101, thereby affecting the water intake speed of the user.

Exemplarily, the electric pressure device is also configured to make the pressure in the second chamber 322 lower than the pressure in the first chamber 321 immediately when the user stops taking water, so as to store filtered water in the first chamber 321 . That is to say, in the above embodiment, when the user takes water, two situations may occur: the first is that the filtered water in the first chamber 321 is not completely discharged, and the second chamber 322 has not yet reached the maximum volume; The second is that the filtered water in the first chamber 321 has been completely discharged, and the second chamber 322 has also reached the maximum volume at this time. In any of the above situations, once the user stops taking water, the second chamber 322 will release pressure preferentially, so that the second chamber 322 will no longer be able to provide squeezing force to the first chamber 321 . Based on the premise that the filtered water is still being prepared, the filtered water will be able to enter the first chamber 321 for storage, and the pressure of the first chamber 321 will also be greater than the pressure of the second chamber 322 .

It can be seen that the water purifier with this setting can start to store filtered water in the first chamber 321 immediately after the user stops taking water, which can improve the use efficiency of the water purifier and shorten the working time of the water purifier. .

In one embodiment, the filtration device may include a reverse osmosis cartridge 310 . The electric pressure device may include a booster pump 210 and a pressure line 220 . The outlet of the booster pump 210 communicates with the raw water inlet 311 of the reverse osmosis filter element 310 . The pure water port 312 of the reverse osmosis filter element 310 communicates with the first chamber 321 through the main water pipeline 300 . The concentrated water port 313 of the reverse osmosis filter element 310 communicates with the second chamber 322 through the pressure pipeline 220 . The booster pump 210 can operate according to the water and electricity start signal generated by the water intake control device.

Taking the water intake control device as an electric control faucet as an example, when the user turns on the electric control faucet to start taking water, the electric control faucet generates a signal to start water intake, and the booster pump 210 can start the booster pump 210 after receiving the electrical signal, Raw water is provided in the reverse osmosis filter element 310 .

The reverse osmosis filter element 310 is in a normal water production state, the pure water filtered by the reverse osmosis filter element 310 can be directly discharged from the water intake 101, and at the same time, the concentrated water generated during the filtration process can enter the second chamber 322 of the water storage device 320 , to pressurize the second chamber 322 to discharge the pre-prepared filtered water in the first chamber 321 . At this time, the pure water discharged from the water intake 101 includes not only the pure water normally prepared by the reverse osmosis filter element 310, but also the filtered water squeezed by the concentrated water from the first chamber 321. The pure water increases the water output per unit time of the water purifier. Moreover, since concentrated water can be continuously injected into the second chamber 322, the pressure in the second chamber 322 can be maintained in a relatively high pressure range, so that the water output per unit time of the first chamber 321 can be relatively large. And more stable.

In the above embodiment, the pressure of the second chamber 322 is maintained by injecting concentrated water into the second chamber 322 . Optionally, in another embodiment, raw water may be injected into the second chamber 322 . Specifically, when the water intake control device generates a signal to start water intake, it can control the reverse osmosis filter element 310 to be in a flushing state, and the raw water entering the reverse osmosis filter element 310 from the raw water port 311 will be discharged from the concentrated water port 313 and enter the second pressure line 220. Two chambers 322 . At this time, the water discharged from the water intake 101 will only come from the first cavity 321 . It can be understood that, within a unit time, the water output from the water intake 101 is equal to the raw water intake of the reverse osmosis filter element 310 . Moreover, since the reverse osmosis filter element 310 does not reverse osmosis filter the raw water in the flushing state, the booster pump 210 can be understood as working without back pressure. In this way, the reverse osmosis filter element 310 is in the The water output in the flushing state is theoretically greater than the sum of the pure water and concentrated water output of the reverse osmosis filter element 310 in the water production state. Therefore, compared with the embodiment of using concentrated water to pressurize the second chamber 322, using raw water to pressurize the second chamber 322 can further increase the water output per unit time of the water purifier.

It can be seen that the water purifier with this arrangement can increase the water output per unit time of the water purifier no matter what state it is in. Moreover, since the pressure in the second chamber 322 comes from the booster pump 210, so While improving the water output per unit time, it can also ensure the stable output of the water flow at the water intake 101, which improves the user experience. For the reverse osmosis water purifier, the booster pump 210 is necessary, so the improved water purifier does not significantly increase the number of devices in the water purifier, and the shape, structure and waterway layout of the existing water purifier etc. are not changed much, so lower manufacturing costs can be guaranteed.

For a reverse osmosis water purifier, the electric pressure device may include a waste water ratio valve 222 . In an embodiment where the reverse osmosis filter element 310 is in a normal water production state when water intake starts, the waste water ratio valve 222 can be arranged on the pressure pipeline 220 . The electric pressure device may also include a concentrated water pipeline 400 . One end of the concentrated water pipeline 400 is connected to the drain port 102 of the water purifier, and the other end of the concentrated water pipeline 400 is connected to the pressure pipeline 220 between the waste water ratio valve 222 and the water storage device 320 . A concentrated water control valve 410 may also be provided on the concentrated water pipeline 400 . When the user starts to take water, the booster pump 210 starts based on the signal for starting water taking generated by the water taking control device, the filtered raw water is discharged from the pure water port 312, the concentrated water control valve 410 can be closed at this time, and the concentrated water passes through the waste water ratio The valve 222 enters into the second cavity 322 of the water storage device 320 and squeezes the first cavity 321 to discharge the pure water in the first cavity 321 . At this time, the pure water discharged from the water intake 101 includes not only the pure water normally produced by the reverse osmosis filter element 310 , but also the filtered water squeezed out by the concentrated water from the first cavity 321 . By setting the wastewater ratio valve 222 on the concentrated water pipeline 400, the concentrated water can be conveniently used to increase the water intake of users.

Of course, in other embodiments, the wastewater ratio valve can also be set on the concentrated water pipeline 400 , but at this time the water entering the second chamber 322 may basically be the raw water entering the reverse osmosis filter element 310 . Among them, the concentrated water control valve 410 can be controlled in various ways, such as electromagnetic control, hydraulic control, mechanical control, etc. Usually, the solenoid valve with electromagnetic control is preferred because the structure of the solenoid valve is simple, and the control signal is an electric signal. Delivery is fast and accurate, and easy to implement.

Further, the electric pressure device also includes a drainage signal generator. The drain signal generator is used to generate a drain electric signal when the volume of the second chamber 322 stops increasing. After the filtered water in the first chamber 321 is completely discharged or the water purifier stops taking water, the volume of the second chamber 322 stops increasing. At this time, the drainage signal generator can generate a drainage electrical signal. The drain signal generator is electrically connected to the concentrated water control valve 410 . The concentrated water control valve 410 may be opened when the drain signal generator generates the drain electrical signal. Wherein, the drain signal generator may include a pressure sensor for detecting the pressure in the pressure pipeline 220 or the second cavity 322 . Optionally, the drainage signal generator may also include a flow sensor for detecting water flow in the pipeline. The water flow in this line can directly or indirectly represent the water flow through the pressure line 220 . For example, the pipeline may be the pressure pipeline 220 or any section of the main water pipeline. Optionally, the drainage signal generator may also include a timer and the like. When the drain signal generator includes a flow meter or a timer, they can generate a drain electric signal after the filtered water in the first cavity 321 is exhausted. As for the situation that the user stops water intake before the filtered water in the first chamber 321 is exhausted, a water intake control device may be needed to control the concentrated water control valve 410 to open. That is to say, part of the function of the water intake control device is used to control the concentrated water control valve 410, and the water intake control device can be used as a part of the drainage signal generator. In short, the function of the drainage signal generator is to generate a drainage electrical signal to control the concentrated water control valve 410 to release the pressure of the second chamber 322 after the filtered water in the first chamber 321 is discharged or the water purifier stops taking water. .

If the water purifier continues to take water after the filtered water in the first cavity 321 of the water storage device 320 is discharged, the electrical signal of the drainage will control the concentrated water control valve 410 to conduct. At this time, the concentrated water port 313 of the reverse osmosis filter element 310 and The second cavity 322 of the water storage device 320 communicates with the water outlet 102 of the water purifier. Since the reverse osmosis filter element 310 is still producing pure water, the concentrated water produced by it can be directly discharged from the water outlet 102 . For the prepared pure water, it can be completely discharged from the water intake 101, or a part can enter the first chamber 321, and the other part is discharged from the water intake 101, which depends on the pressure in the first chamber 321 and the pressure at the water intake 101. value. It is generally considered that the flow capacity of the drain port 102 is smaller than the flow capacity of the water intake 101, so in this case, it can be considered that the pressure in the first chamber 321 is greater than the pressure at the water intake 101, so under normal circumstances, concentrated water control The opening of the valve 410 has no substantial influence on the amount of pure water discharged from the water intake 101 .

If the water purifier has stopped taking water before the pure water in the first chamber 321 of the water storage device 320 has been discharged, the drainage electric signal controls the concentrated water control valve 410 to conduct, then its function is to connect the second chamber 322 with the drainage. The port 102 is connected so that the pure water prepared by the reverse osmosis filter element 310 can be stored in the first cavity 321 for the next water intake. In the embodiment where the drain signal generator includes a flow meter or a timer, the water intake control device can generate a drain electrical signal when the pure water in the first chamber 321 is not exhausted. In this case, the intake control device can be considered as part of the discharge signal generator.

It can be seen that the water purifier with this configuration can control the on/off of the concentrated water control valve 410 through the drainage signal generator, and then release the pressure of the second chamber 322 of the water storage device 320 . In this way, it can be ensured that the pure water will continue to be stored in the first chamber 321 after the water intake is completed, and it can be ensured that after the second chamber 322 squeezes the first chamber 321, the concentrated water can be discharged from the drain port 102, and the reverse osmosis filter element 310 plays a protective role.

In an embodiment where the reverse osmosis filter element 310 is in a flushing state when water intake starts, the electric pressure device may include a flushing control valve 223 , as shown in FIG. 2 . In the embodiment shown in FIG. 2, the same or similar components as those in the embodiment shown in FIG. 1 will use the same reference numerals as in FIG. The components will not be further detailed. Among them, the flush control valve 223 can be controlled in various ways, such as electromagnetic control, hydraulic control, mechanical control, etc. Usually, the solenoid valve with electromagnetic control is preferred, because the structure of the solenoid valve is simple, the control signal is an electric signal, and the signal transmission Fast and accurate, easy to implement.

The flushing control valve 223 is connected in parallel with the waste water ratio valve 222 on the pressure pipeline 220 . The flushing control valve 223 and the wastewater ratio valve 222 can be combined into a combined control valve in the prior art. The flushing control valve 223 is electrically connected with the water intake control device. The flushing control valve 223 is opened when the water intake control device generates an electric signal to start water intake. That is to say, when the user starts to take water, since the flushing control valve 223 is opened, the reverse osmosis filter element 310 is in a flushing state. After the raw water enters the reverse osmosis filter element 310, it is completely discharged from the concentrated water port 313, enters the second chamber 322 of the water storage device 320, squeezes the first chamber 321, and discharges the filtered water in the first chamber 321. At this time, all the water discharged from the water intake 101 can come from the first chamber 321 . As mentioned above, this setting not only increases the water output per unit time compared with the water purifiers in the prior art, but also further improves the unit time compared with the embodiment of using concentrated water to squeeze the first chamber 321 The water output, the specific principle will not be repeated.

Further, the electric pressure device may also include a drainage signal generator. The drain signal generator is used to generate a drain electric signal when the volume of the second chamber 322 stops increasing. After the filtered water in the first chamber 321 is completely discharged or the water purifier stops taking water, the volume of the second chamber 322 will stop increasing. At this time, the drainage signal generator can generate a drainage electrical signal. The drain signal generator is electrically connected to the concentrated water control valve 410 and the flushing control valve 223 . When the drain signal generator generates the drain electrical signal, the concentrated water control valve 410 is opened, and the flushing control valve 223 is closed. The drain signal generator may be the same as that in the embodiment shown in FIG. 1 , and may include one or more of a pressure sensor, a flow sensor, or a timer. The function of the drainage signal generator is to release the pressure of the second chamber 322 when the filtered water in the first chamber 321 is completely discharged or stop water intake, and at the same time, control the reverse osmosis filter element 310 to change from the flushing state to the normal water production state.

It can be seen from this that the water purifier with this setting can release the pressure of the second chamber 322 of the water storage device and control the use state of the reverse osmosis filter element 310 through the drainage signal generator, the concentrated water control valve 410 and the flushing control valve 223 . This can ensure that the reverse osmosis filter element 310 is converted from the flushing state to the normal water production state after the flushing water is used to squeeze the first chamber 321, and the concentrated water can be discharged from the drain port 102, which plays a role in the reverse osmosis filter element 310. Protective effects.

Preferably, in the embodiment shown in Fig. 1 and Fig. 2, the drainage signal generator may include a first high pressure switch 221, the first high pressure switch is arranged on the pressure pipeline 220, and is located between the waste water ratio valve 222 and the water storage device Between 320. The function of the first high pressure switch 221 is to detect the pressure in the pipeline where it is located, and generate a drainage electric signal when the pressure in the pipeline reaches the first pressure level P1.

The working principle of the drainage signal generator using the first high voltage switch 221 will be described below with reference to FIG. 1 . Take the reverse osmosis filter element 310 in the normal water production state when it starts to take water as an example. After the filtered water in the first chamber 321 is squeezed out, the user is still taking water, and the concentrated water produced by the reverse osmosis filter element 310 continues to enter the second cavity. In the cavity 322, at this time, the pressure in the second cavity 322 rises. When the pressure reaches the first pressure level P1, the first high pressure switch 221 generates a drain electric signal, and the concentrated water control valve 410 opens. When the filtered water in the first chamber 321 is not exhausted and the user stops taking water, the booster pump 210 continues to work, and the concentrated water produced by the reverse osmosis filter element 310 continues to enter the second chamber 322. At this time, the second chamber 322 The internal pressure rises, and when the pressure reaches the first pressure level P1, the first high pressure switch 221 generates a drain electric signal, and the concentrated water control valve 410 opens. The opening of the concentrated water control valve 410 enables the concentrated water produced by the reverse osmosis filter element 310 to be discharged from the water purifier, avoiding the damage of the reverse osmosis filter element 310 and releasing the pressure on the second chamber 322 .

It can be seen that when the drainage signal generator includes the first high-voltage switch 221, no matter whether the user stops taking water before or after the pure water in the first chamber 321 is exhausted, only the first high-voltage switch 221 can be used to generate the drainage electrical signal. , to control the opening of the concentrated water control valve 410, so the control logic is simple and does not need to be used in conjunction with other sensors. In addition, in this embodiment, not only the pressure in the pipeline can be directly used to control the concentrated water control valve 410, but also the detected pressure can be used as the safety pressure of the pipeline to reduce the cost of controlling by factors such as flow rate and time. resulting error. Moreover, the cost of the high-voltage switch is low, the precision is high, and it is strong and durable.

Exemplarily, the water intake control device may include a one-way valve 331 and a third high pressure switch 332 sequentially arranged along the water flow direction, and the maximum pressure in the second chamber 322 is lower than the closing pressure of the third high pressure switch 332 . Taking Figure 1 as an example, the water intake 101 is connected to a mechanical faucet. By operating the mechanical faucet, the pressure in the main water pipeline can be changed, and then the pressure level detected by the third high-pressure switch 332 generates a signal to start water intake and stop water intake. electric signal. Wherein, in the embodiment described above, if the first high-voltage switch 221 and the third high-voltage switch 332 appear at the same time, the pressure level P3 sent by the third high-voltage switch 332 to indicate that the signal to stop taking water and electricity should be higher than that of the first high-pressure switch. 221 sends the pressure level P1 representing the drainage electric signal, that is, P3>P1. The working principle of the water purifier with the above water intake control device is well known to those skilled in the art, and will not be repeated here.

The water purifier with this setting can be connected to a mechanical faucet at the water intake. By operating the mechanical faucet, the pressure in the main water pipeline can be changed, and then the water purifier can be controlled, which improves the scope of application of the water purifier to the faucet.

In another set of embodiments, as shown in FIG. 3 , the electric pressure device may include an air pump 230 connected to the second chamber 322 . In the embodiment shown in FIG. 3, the same or similar components as those in the embodiment shown in FIGS. These same or similar components will not be described in further detail.

The air pump 230 is activated to inject compressed air into the second chamber 322, thereby increasing the pressure of the second chamber 322 to discharge a large amount of filtered water in the first chamber 321 and increase the water intake speed of the user. Usually, the pressure generated by the air pump 230 is constant, so by using the air pump 230, the water output of the water purifier can also be ensured to be stable, and user experience can be improved. At the same time, using the air pump 230 can also reduce the setting of water channels in the water purifier, reduce the difficulty of water channel design, and thus greatly shorten the water channel design cycle of the water purifier.

Moreover, in the case of using the air pump 230, the water purifier can use various types of filter elements, and the reason is that a booster pump can be used as an electric pressure device at this time.

Exemplarily, the second cavity 322 of the water storage device 320 may be provided with an air outlet. The exhaust port is connected with an exhaust device 324 . The exhaust device 324 may be opened when the volume of the second chamber 322 stops increasing or when the user stops taking water. Among them, the embodiment in which the volume of the second chamber 322 stops increasing can be divided into the situation that the user continues to take water after the filtered water in the first chamber 321 has been completely discharged, and the situation that the filtered water in the first chamber 321 is not completely discharged, and the user The water supply has been stopped. The exhaust device can be opened according to the above two situations, so as to exhaust the second cavity 322 . And only according to the embodiment that the user stops taking water and just opens the exhaust device 324, then no matter whether the filtered water in the first chamber 321 is completely discharged, the exhaust device 324 is only controlled according to the signal of stopping water taking.

It can be seen from this that the water purifier with this setting has various types of control methods, which can be applied to different devices and application occasions.

In a first embodiment, the exhaust device 324 may include a second high pressure switch and a control valve. The second high pressure switch can generate an electric discharge signal when the pressure in the second chamber 322 reaches the second pressure level P2, and the control valve can be opened according to the electric discharge signal. No matter in the case of continuing to take water after the filtered water in the first chamber 321 is completely discharged, or in the case of closing the faucet to stop water taking before the filtered water in the first chamber 321 has been completely discharged, the air pump 230 is in a continuous state. In the working state, the pressure in the second chamber 322 will continue to rise. When the pressure in the second chamber 322 reaches the second pressure level P2, the control valve opens to release the pressure in the second chamber 322 . The above-mentioned first pressure level P1 is a hydraulic value, and the second pressure level P2 is a pneumatic value, so P1 and P2 may have different reference standards in their respective fields, and thus may not be equal. Of course, the second pressure level P2 can also take the same value as the above-mentioned first pressure level P1.

Therefore, the water purifier with this setting can control the exhaust device according to the pressure in the second chamber 322, and its logic is simple and easy to implement.

Among them, there are many control methods of the control valve, such as electromagnetic control, hydraulic control, mechanical control, etc. Usually, the electromagnetic control solenoid valve is preferred because the structure of the solenoid valve is simple, the control signal is an electrical signal, and the signal transmission speed is fast. And accurate, easy to implement.

In a second embodiment, the air pump 230 may have a safety valve, and the exhaust device opens when the user stops taking water. The function of the safety valve of the air pump 230 is to discharge the high-pressure air when the outlet pressure of the air pump 230 is too high, so as to avoid damage to the air pump 230 . Therefore, in this embodiment, if the filtered water in the first chamber 321 is completely discharged and continues to take water, the pressure in the second chamber 322 is too high and there is nowhere to release it, so it will first be discharged through the safety valve of the air pump 230 . After the faucet is closed and the generation of water and electricity signals is stopped, the exhaust device is opened to completely release the pressure of the second chamber 322 . And if the filtered water in the first chamber 321 has not been completely discharged and the tap is closed to stop water intake, then the exhaust device has been opened because the pressure in the second chamber 322 has not yet risen to the level of opening the safety valve. , so there will be no process of exhausting through the safety valve first.

It can be seen that the air pump 230 with a safety valve can make the closing of the air pump 230 only controlled by the signal of stopping water and electricity, which is simple in logic and can also reduce the number of devices on the water purifier.

In a third embodiment, the exhaust device 324 may be an automatic exhaust valve. The so-called automatic exhaust valve is that when the pressure in the pipeline where it is located is higher than the predetermined value, the exhaust valve is automatically opened, and when the pressure in the pipeline where it is located is lower than the predetermined value, the exhaust valve is automatically closed. On the one hand, when the filtered water in the first chamber 321 is completely discharged and the water intake continues, since the air pump 230 is still working, the pressure in the second chamber 322 will continue to rise until it reaches the predetermined value of the automatic exhaust valve. When the value is , the automatic exhaust valve is opened to release the pressure of the second chamber 322 . On the other hand, when the water intake is stopped and the water purifier starts to store water in the first chamber 321, the volume of the first chamber 321 increases and squeezes the second chamber 322. The function of the automatic exhaust valve can be to The gas in the second chamber 322 is exhausted.

By setting the exhaust device as an automatic exhaust valve, the control logic relationship between the various devices in the water purifier can be reduced, and the automatic exhaust valve has a simple structure, convenient installation, low cost and easy implementation.

According to another aspect of the present invention, a control method for a water purifier is provided. The water purifier can include an electric pressure device and a main water pipeline 300 connected to the water intake 101. On the main water pipeline 300, a filter device and a water storage device 320 are sequentially arranged along the water flow direction. The water storage device 320 includes a first cavity 321 and a water storage device 320. The second cavity 322, the first cavity 321 communicates with the main water pipeline 300, the first cavity 321 is used to store the filtered water filtered by the filter device, the second cavity 322 communicates with the electric pressure device, the first cavity 321 and the second cavity 322 The volume of the cavity can be changed according to the pressure in the cavity, and the volumes of the first cavity 321 and the second cavity 322 are negatively correlated.

A control method will be described below in conjunction with the flow chart shown in Figure 4 and the water circuit diagram of the water purifier shown in Figure 1, including:

Step S1: Generate a water and electricity start signal in response to the user's water drawing operation. The signal to start water withdrawal can be generated by any of the water withdrawal control devices described above.

Step S2: The electric pressure device pressurizes the second chamber 322 according to the signal of starting to take water and electricity, so that the pressure in the second chamber 322 is greater than the pressure in the first chamber 321 . Thus, the filtered water stored in the first chamber 321 can be squeezed out for the user to take.

This method pressurizes the second chamber 322 through the electric pressure component, so that the pressure in the second chamber 322 is maintained at a relatively high pressure range, thereby ensuring the stability of the water output of the water purifier and avoiding the discharge of filtered water. However, the water output decreases, so that the user's water intake speed can be increased, and the user's experience can be improved.

In a specific embodiment, in the step S2 of pressurizing the second chamber, the electric pressure device makes the pressure in the second chamber 322 continuously greater than the pressure in the first chamber 321 according to the signal of starting to take water and electricity. In the flowchart shown in Fig. 5, in order to distinguish this specific implementation step from step S2 in Fig. 4, its standard is step S2'. By continuously making the pressure in the second chamber 322 greater than the pressure in the first chamber 321 , the second chamber 322 can continuously squeeze the first chamber 321 to provide a stable water flow.

Based on this, the control method further includes step S3 after step S2': the electric pressure device makes the pressure in the second chamber 322 lower than the pressure in the first chamber 321 when the user stops taking water. Its function is to start storing filtered water in the first chamber 321 immediately after the user stops taking water, which can improve the use efficiency of the water purifier and shorten the working time of the water purifier.

In the following specific embodiment, that is: "the filter device includes a reverse osmosis filter element 310, the electric pressure device includes a booster pump 210, a pressure pipeline 220, a waste water ratio valve 222, a concentrated water pipeline 400 and a drainage signal generator, and the booster The outlet of the pressure pump 210 communicates with the raw water port 311 of the reverse osmosis filter element 310, the pure water port 312 of the reverse osmosis filter element 310 communicates with the first chamber 321 through the main water pipeline 300, and the concentrated water port 313 of the reverse osmosis filter element 310 passes through the pressure pipeline 220 It communicates with the second chamber 322, and the waste water ratio valve 222 is arranged on the pressure pipeline 220. One end of the concentrated water pipeline 400 is connected to the drain port 102 of the water purifier, and the other end of the concentrated water pipeline 400 is connected between the waste water ratio valve 222 and the water storage device. 320 is connected to the pressure pipeline 220, and a concentrated water control valve 410 is also provided on the concentrated water pipeline 400, "

Pressurizing the second chamber 322 can be realized by running the booster pump 210 according to the signal of starting to take water and electricity. In this way, the existing booster pump 210 of the reverse osmosis water purifier can be used to realize the function of squeezing the first chamber 321, so as to avoid increasing the number of parts of the water purifier. In the flow chart shown in FIG. 6 , in order to distinguish this specific implementation step from step S2 in FIG. 4 , it is standardized as step S2”.

Next, the following steps will be performed: generating a drain electric signal when the volume of the second chamber 322 stops increasing; opening the concentrated water control valve 410 according to the drain electric signal; and when the first chamber 321 reaches its maximum volume , stop the booster pump 210 and close the concentrated water control valve 410 . The electrical drain signal can be generated by any of the electrical drain signal generators mentioned above.

Specifically, as shown in FIG. 6, in step S4, it is determined whether the volume of the second chamber 322 stops increasing. When the volume of the second chamber 322 stops increasing, step S5 is executed to generate a drain electrical signal; otherwise, step S2" will be returned. In step S6, the concentrated water control valve 410 is opened according to the drain electrical signal. The second chamber 322 starts to drain water to store filtered water in the first cavity 321. Execute step S7 in this process, judge whether the first cavity 321 reaches its maximum volume. When the first cavity 321 reaches its maximum volume, perform step S8, generate Stop getting water and electricity signal; Otherwise, return to execution step S6.In step S9, booster pump 210 shuts down and closes concentrated water control valve 410.So far, water purifier enters standby phase.It can be understood that step S3 can include step S4 -S6.

In another set of embodiments, the electric pressure device further includes a flushing control valve 223 , as shown in FIG. 2 , the flushing control valve 223 and the wastewater ratio valve 222 are connected in parallel to the pressure pipeline 220 . In this case, the control method is as shown in FIG. 7. In step S2", while the booster pump 210 is operated according to the signal of starting water and electricity, step S20 is also executed to open the flushing control valve 223. In step S6, according to the discharge electricity When the signal opens the concentrated water control valve 410, it also executes step S60 to close the flushing control valve 223. Like this, flushing water can be used to squeeze the first cavity 321, so not only the unit is improved compared with the water purifier in the prior art. The water output per unit time is further improved compared with the embodiment using concentrated water to squeeze the first chamber 321. The other steps in Fig. 7 are the same as those in Fig. 6, and will not be further described herein.

In addition, when the water purifier is used for a long time, the reverse osmosis filter element 310 needs to be flushed, and the flushing control valve 223 and the waste water ratio valve 222 are connected in parallel to the pressure line 220 . In this case, after step S8 shown in FIGS. 6 and 7, as shown in FIG. 8,

Step S10 is executed to accumulate the working time T1 of the reverse osmosis filter element 310 .

Step S11 is executed, when the first chamber 321 reaches its maximum volume, it is judged whether the working time T1 is greater than the first preset threshold T10. When the working time T1 is greater than the first preset threshold T10, execute step S12 to keep the booster pump 210 running, open the flushing control valve 223 and the concentrated water control valve 410 to flush the reverse osmosis filter element 310, and the water purifier enters rinse phase.

In the flushing stage, step S13 is executed to count the flushing time of the reverse osmosis filter element 310 to obtain the flushing duration T2. It is judged whether the flushing duration T2 is greater than the second preset threshold T20. When the flushing duration T2 is greater than the second preset threshold T20 , step S14 is executed to stop the booster pump 210 and close the flushing control valve 223 and the concentrated water control valve 410 . The water purifier enters the standby phase. Since one flushing has been completed, when entering the standby stage, the working time T1 of the reverse osmosis filter element 310 is accumulated again.

Exemplarily, in the process of flushing the reverse osmosis filter element 310 , when receiving the water supply signal, close the concentrated water control valve 410 , and return to the step of pressurizing the second chamber 322 . The water purifier quickly enters the water intake stage from the flushing stage. That is to say, the water intake stage of the water purifier has priority over the flushing stage. Once the water and electricity signal for starting water intake is received in the flushing stage, the water purifier will enter the water intake stage.

The control method of the water purifier according to an embodiment of the present invention will be described in detail below with the schematic diagram of the water circuit in FIG. 2 and the flow chart shown in FIG. 9 . The water outlet control device is the third high pressure switch 332 , the drainage signal generator is the first high pressure switch 221 , the electric pressurizing device includes a booster pump 210 , and the filtering device includes a reverse osmosis filter element 310 .

Referring to FIG. 9 , in the standby stage, the booster pump 210 is stopped, the concentrated water control valve 410 is closed, the flushing control valve 223 is closed, and the first chamber 321 is filled with pure water. When the user turns on the faucet to start taking water, step S1 is executed, and the third high-voltage switch 332 generates a signal to start taking water and electricity. Next, step S2" is executed, and the booster pump 210 runs according to the received signal of starting to take water and electricity. Optionally, the concentrated water can enter the second chamber 322 to squeeze the first chamber 321; the flushing control valve can also be opened 223. Utilize flushing water to squeeze the first chamber 321. When the concentrated water is used to squeeze the first chamber 321, the water discharged from the water intake 101 is the filtered water stored in the first chamber 321 and the pure water prepared by the reverse osmosis filter element 310. Water. Step S4 is performed to determine whether the volume of the second chamber 322 stops increasing. After the user closes the tap or after the filtered water in the first chamber 321 is discharged, the volume of the second chamber 322 will stop increasing, and the second chamber 322 will stop increasing. The pressure in the second cavity 322 will also gradually increase. In step S5, the first high pressure switch generates a drain electric signal. Then step S6 is performed, the concentrated water control valve 410 is opened, and the concentrated water produced by the reverse osmosis filter element 310 will be directly discharged by the drain. At the same time, the second chamber 322 can also release the pressure through the concentrated water pipeline 400. If the user continues to take water, the pure water prepared by the reverse osmosis filter element 310 will be directly discharged from the water intake 101; , the pure water prepared by the reverse osmosis filter element 310 will first enter the first chamber 321 for storage. Execute step S7 to judge whether the volume of the first chamber 321 reaches the maximum. After the first chamber 321 is filled with filtered water, the first chamber The volume of 321 will reach the maximum, and the pressure of main water pipeline 300 will also increase thereupon, execute step S8, the 3rd high-pressure switch 332 generates and stops to take water and electricity signal.Execute step S10, the working time length T1 of cumulative reverse osmosis filter element 310. In step S11, the working time T1 of the reverse osmosis filter element 310 is judged. If the working time T1 is less than the first preset threshold T10, return to step S10, and the water purifier will enter the standby state, waiting for the user to fetch water next time. If the working time is long T1 is greater than or equal to the first preset threshold T10, then the water purifier will enter the flushing stage, and step S12 is performed. In step S12, the booster pump 210 continues to run and opens the flushing control valve 223 and the concentrated water control valve 410, so that A large amount of raw water passes through the reverse osmosis filter element 310 quickly, and is discharged by the flushing control valve 223. At the same time, step S13 is performed to obtain the flushing duration T2. When the flushing duration T2 is greater than or equal to the second preset threshold T20, step S14 is executed, and the flushing ends. Enter the standby state and re-accumulate the working time T1 of the reverse osmosis filter element 310. Wherein, in the process of flushing time T2 less than the second preset threshold T20, it is also necessary to judge whether the user takes water. If the user starts to take water, then execute step S15 to judge whether Generate and start to get the water and electricity signal. If generate and start to get the water and electricity signal, then the water purifier will end the flushing phase, execute step S16, make the booster pump 210 continue to run, close the concentrated water control valve 410 and the flushing control valve 223, and enter the water intake phase with priority , execute the work of fetching water. Otherwise, proceed to step S12 to flush the reverse osmosis filter element 310 .

In the description of the present invention, it should be understood that orientation words such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "vertical" ", "horizontal" and "top", "bottom" and other indicated orientations or positional relationships are generally based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and no contrary description is made In the case of , these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the scope of protection of the present invention; the orientation words "in", " "Outside" refers to inside and outside with respect to the outline of each component itself.

For ease of description, spatially relative terms such as "on", "over", "on the surface of", "above" and the like may be used herein to describe what is shown in the drawings The spatial relationship of one or more parts or features to other parts or features. It will be understood that spatially relative terms encompass not only the orientation of components as depicted in the figures, but also different orientations in use or operation. For example, if an element in a drawing is shown entirely upside down, references to elements "above" or "over" other elements or features would include elements "beneath" the other element or feature or "above the other element or feature". under construction". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". In addition, these components or features may be positioned at other different angles (eg, rotated 90 degrees or other angles), all such situations are intended to be encompassed herein.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, components, components and/or combinations thereof.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the claimed scope of the present invention. within the range. The protection scope of the present invention is defined by the appended claims and their equivalent scope.

Claims (21)

1. A water purifier, characterized in that, the water purifier comprises an electric pressure device and a main water pipeline connected to the water intake, on which a filtering device, a water storage device and water control device, The water storage device includes a first chamber and a second chamber, the first chamber communicates with the main water pipeline, the first chamber is used to store filtered water filtered by the filter device, and the second chamber communicated with the electric pressure device, the first chamber and the second chamber can change their volumes according to the pressure in the chamber, and the volumes of the first chamber and the second chamber are negatively correlated, The electric pressure device is configured to pressurize the second cavity when the water intake control device generates a water intake start signal in response to the user's water intake operation, so that the pressure in the second cavity is greater than the The pressure in the first chamber. 2. The water purifier according to claim 1, wherein the electric pressure device is further configured to make the pressure in the second chamber continuously greater than that in the first chamber according to the electric signal for starting to take water. pressure, at least until the user stops dispensing. 3. The water purifier according to claim 1, wherein the electric pressure device is further configured to immediately make the pressure in the second chamber lower than the pressure in the first chamber when the user stops taking water, to store filtered water in the first chamber. 4. The water purifier according to claim 1, wherein the filtering device comprises a reverse osmosis filter element, and the electric pressure device comprises a booster pump and a pressure pipeline, The outlet of the booster pump communicates with the raw water port of the reverse osmosis filter element, the pure water port of the reverse osmosis filter element communicates with the first chamber through the main water pipeline, and the concentrated water port of the reverse osmosis filter element passes through The pressure pipeline communicates with the second chamber, The booster pump operates according to the signal of starting to take in water and electricity. 5. The water purifier according to claim 4, wherein the electric pressure device further comprises: A waste water ratio valve, the waste water ratio valve is arranged on the pressure pipeline; and Concentrated water pipeline, one end of the concentrated water pipeline is connected to the drain of the water purifier, and the other end of the concentrated water pipeline is connected to the pressure pipeline between the waste water ratio valve and the water storage device , a concentrated water control valve is also arranged on the concentrated water pipeline. 6. The water purifier according to claim 5, wherein the electric pressure device further comprises a drainage signal generator, and the drainage signal generator is used to generate a drainage signal when the volume of the second chamber stops increasing. The drain signal generator is electrically connected to the concentrated water control valve, and the concentrated water control valve is opened according to the drain electrical signal. 7. The water purifier according to claim 5, wherein the electric pressure device further comprises a flushing control valve, and the flushing control valve is connected in parallel with the waste water ratio valve on the pressure pipeline, the The flush control valve is electrically connected to the water intake control device, and the flush control valve is opened when the water intake control device generates the electrical signal for starting water intake. 8. The water purifier according to claim 7, wherein the electric pressure device further comprises a drainage signal generator, and the drainage signal generator is used to generate drainage when the volume of the second chamber stops increasing. electrical signal, the drainage signal generator is electrically connected to the concentrated water control valve and the flushing control valve, the concentrated water control valve is opened according to the drainage electrical signal, and the flushing control valve is opened according to the drainage electrical signal And off. 9. The water purifier according to claim 6 or 8, wherein the drainage signal generator comprises a first high pressure switch, and the first high pressure switch is arranged on the pressure pipeline and is located at the waste water ratio. Between the valve and the water storage device, the first high pressure switch generates the drain electric signal when the pressure in the pipeline where it is located reaches a first pressure level. 10. The water purifier of claim 1, wherein the electric pressure device comprises an air pump connected to the second chamber. 11. The water purifier according to claim 10, wherein the second chamber is provided with an exhaust port, and the exhaust port is connected with an exhaust device, and the exhaust device is installed in the second chamber. Opens when the volume stops increasing or when the user stops dispensing water. 12. The water purifier according to claim 11, wherein the exhaust device comprises a second high-pressure switch and a control valve, and the pressure of the second high-pressure switch in the second cavity reaches a second pressure When level, an exhaust electrical signal is generated, and the control valve is opened according to the exhaust electrical signal. 13. The water purifier according to claim 11, wherein the air pump has a safety valve, and the exhaust device is opened when the user stops taking water. 14. The water purifier according to claim 11, wherein the exhaust device comprises an automatic exhaust valve, and the automatic exhaust valve is opened when the volume of the second chamber stops increasing. 15. The water purifier according to claim 1, wherein the water intake control device includes a one-way valve and a third high-pressure switch arranged in sequence along the direction of water flow, and the maximum pressure in the second chamber is lower than the Closing pressure of the third high pressure switch. 16. A control method for a water purifier, characterized in that, The water purifier includes an electric pressure device and a main water pipeline connected to the water intake, and a filtering device and a water storage device are sequentially arranged along the water flow direction on the main water pipeline, The water storage device includes a first chamber and a second chamber, the first chamber communicates with the main water pipeline, the first chamber is used to store filtered water filtered by the filter device, and the second chamber communicated with the electric pressure device, the first chamber and the second chamber can change their volumes according to the pressure in the chamber, and the volumes of the first chamber and the second chamber are negatively correlated, The control methods include: generating a water and electricity start signal in response to a user's water withdrawal operation; and The electric pressure device pressurizes the inside of the second chamber according to the signal of starting to take water and electricity, so that the pressure in the second chamber is greater than the pressure in the first chamber. 17. The control method according to claim 16, characterized in that, in the step of pressurizing the second chamber, the electric pressure device makes the second chamber The pressure in is continuously greater than the pressure in the first chamber; After the step of pressurizing the second cavity, the control method further includes: The electric pressure device makes the pressure in the second chamber smaller than the pressure in the first chamber when the user stops taking water. 18. The control method according to claim 16, characterized in that, The filter device includes a reverse osmosis filter element, the electric pressure device includes a booster pump, a pressure pipeline, a waste water ratio valve, and a concentrated water pipeline, and the outlet of the booster pump is connected to the raw water port of the reverse osmosis filter element, so The pure water port of the reverse osmosis filter element communicates with the first chamber through the main water pipeline, the concentrated water port of the reverse osmosis filter element communicates with the second chamber through the pressure pipeline, and the waste water ratio valve is set On the pressure pipeline, one end of the concentrated water pipeline is connected to the drain of the water purifier, and the other end of the concentrated water pipeline is connected to the On the pressure pipeline, a concentrated water control valve is also arranged on the concentrated water pipeline, The pressurization of the second cavity is realized by operating the booster pump according to the signal of starting to take water and electricity, After the step of pressurizing the second cavity, the control method further includes: generating a drain electrical signal when the volume of the second chamber ceases to increase; opening the concentrated water control valve according to the drain electric signal; and When the first chamber reaches its maximum volume, the booster pump is stopped and the concentrated water control valve is closed. 19. The control method according to claim 18, characterized in that, The electric pressure device also includes a flushing control valve, the flushing control valve is connected in parallel with the waste water ratio valve on the pressure pipeline, The control method also includes: The booster pump is operated according to the signal of starting to take water and electricity, and at the same time, the flushing control valve is opened, While opening the concentrated water control valve according to the drain electrical signal, the flushing control valve is also closed. 20. The control method according to claim 18, characterized in that, The electric pressure device also includes a flushing control valve, the flushing control valve is connected in parallel with the waste water ratio valve on the pressure pipeline, The control method also includes: Accumulate the working hours of the reverse osmosis filter element; When the first cavity reaches its maximum volume, it is judged whether the working time is greater than a first preset threshold, wherein, when the working time is longer than the first preset threshold, the booster pump is continued to run , opening the flushing control valve and the concentrated water control valve to flush the reverse osmosis filter element; Timing the time for flushing the reverse osmosis filter element to obtain the flushing duration; judging whether the flushing duration is greater than a second preset threshold, wherein, when the flushing duration is greater than the second preset threshold, stop the booster pump and close the flushing control valve and the concentrated water control valves; and The working hours of the reverse osmosis filter element are accumulated again. 21. The control method according to claim 20, characterized in that, in the process of flushing the reverse osmosis filter element, when the signal for starting water and electricity is received, the flushing control valve and the flushing control valve are closed. The concentrated water control valve returns to perform the step of pressurizing the second chamber.

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